Journal of Microbiology

The Microbiological Society of Korea (한국미생물학회)
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Characteristics of Several Bacterial Isolates Capable of Degrading Chloroaliphatic Compounds via Hydrolytic Dechlorination

  • Song, Ji-Sook (Department of Microbiology and Biotechnology Research Institute, Chungbuk National University) ;
  • Lee, Dong-Hun (Department of Microbiology and Biotechnology Research Institute, Chungbuk National University) ;
  • Lee, Kyoung (Department of Microbiology, Changwon National University) ;
  • Kim, Chi-Kyung (Department of Microbiology and Biotechnology Research Institute, Chungbuk National University)
  • Published : 2003.01.01
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Abstract

Haloaliphatic hydrocarbons have been widely used as solvents and ingredients of pesticides and herbicides. However, when these compounds contaminate the environment, they can be very hazardous to animals and humans because of their potential toxicity and carcinogenicity. Therefore, lots of studies have been made for microbial degradation of those pollutant chemicals. In this study, 11 bacterial strains capable of degrading 1,2-dichloroethane (1,2-DCA), 2-chloropropionic acid (2-CPA), 2,3-dichloropropionic acid (2,3-DCPA), and 2-monochloroacetic acid (2-MCA) by hydrolytic dechlorination under aerobic conditions were isolated from wastewaters and rice paddy soil samples. Their morphological and biochemical characteristics and their degradation capabilities of haloaliphatic hydrocarbons were examined. On the basis of the 16S rDNA sequences, 8 different kinds of microbial species, including Pseudomonas plecoglossicida, Xanthobacter flavus, Ralstonia eutropha, were identified. All of the isolated strains can degrade MCA. In particular, strains UE-2 and UE-15 degraded 1,2-DCA, and strain CA-11 degraded 2,3-DCPA, which are hardly degraded by other strains.

Keywords

References

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